The level of street-network sprawl in new development in Santiago Metropolitan followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Santiago Metropolitan, we can consider three of its most populous cities: Santiago, Peñaflor and Melipilla. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Santiago rose steadily. The level of street-network sprawl in new development in Peñaflor followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Melipilla peaked in 1991-2005.

As of 2020, the city with the most disconnected street network in Santiago Metropolitan is Peñaflor with an SNDi of 4.5, which is sprawly. Conversely, the most connected city is Melipilla with an SNDi of 2.54, which is relatively well-connected. See trends for these cities: Melipilla, Peñaflor

The level of street-network sprawl in the aggregate network in Santiago Metropolitan rose steadily. To get a sense of how the aggregate street network has changed in Santiago Metropolitan, we can consider three of its most populous cities: Santiago, Peñaflor and Melipilla. Out of the three cities, Peñaflor does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Peñaflor was at its lowest in 1976-1990.